CN215721030U - Inclined disc type butterfly check valve - Google Patents

Abstract

The utility model provides a swash plate butterfly check valve which comprises a valve body, a disc plate and a main shaft, wherein the periphery of the main shaft is sleeved on the side wall of the valve body, the disc plate is arranged on the periphery of the main shaft, the main shaft and the disc plate are eccentrically arranged, the disc plate is positioned in the valve body, the valve body and the disc plate are concentrically arranged, a buffer assembly is fixedly arranged on the outer wall of the valve body, a pressure relief valve is arranged on the disc plate, and one end of the buffer assembly is fixedly arranged on the periphery of one end of the main shaft through a transmission assembly. According to the inclined disc type butterfly check valve, the disc plate is additionally provided with the pressure release valve for actively eliminating secondary water hammer, when the check valve is closed and water in the pipe at the downstream of the disc plate flows back, pressure of high-pressure water is released to the end cover after passing through the pressure release hole and the second through hole, after the water pressure overcomes the pressure at the upstream of the disc plate and the elasticity of the spring, the spring is compressed, a gap is formed between the end cover and one end of the disc plate, and the high-pressure water flows into the valve body at the upstream of the disc plate and the pipeline through the pressure release hole, the second through hole and the gap, so that the pressure at the downstream of the valve body is released, and the water hammer is eliminated.

Description

Inclined disc type butterfly check valve

Technical Field

The utility model belongs to the field of check valves, and particularly relates to a swash plate butterfly check valve.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end and flows out from the outlet end. The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. The swing check valve is provided with a valve clack which is obliquely arranged and can rotate around a shaft, the working principle is similar to that of a lifting check valve, the check valve arranged in a pipeline in the prior art is mostly selected from the swing check valves, after the check valve is closed, pressure is applied in the pipeline at the downstream of the check valve, water hammer is caused by water backflow, according to the water hammer theory, the closing time of the check valve is zero when the medium flow rate is zero, and at the moment, if the check valve is synchronously closed, no water hammer exists, so that the check valve synchronously closed at the zero flow rate needs to be researched.

Disclosure of Invention

In view of the above, the present invention is directed to a swash plate butterfly check valve, so as to solve the problem of water hammer generated when the check valve in the pipeline is closed in the prior art.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a swash plate butterfly check valve comprises a valve body, a disc plate and a main shaft, wherein the periphery of the main shaft is sleeved on the side wall of the valve body, the disc plate is installed on the periphery of the main shaft, the main shaft and the disc plate are eccentrically arranged, the disc plate is located in the valve body, the valve body and the disc plate are concentrically arranged, a buffering assembly is fixedly installed on the outer wall of the valve body, a pressure release valve is installed on the disc plate, one end of the buffering assembly is fixedly installed on the periphery of one end of the main shaft through a transmission assembly, the pressure release valve comprises an end cover, a sliding shaft, a flow release sleeve, a spring and a lock nut, a pressure release hole is formed in the disc plate, the periphery of the flow release sleeve is fixedly connected into the pressure release hole, a first through hole is formed in the middle of the flow release sleeve, one end of the sliding shaft is fixedly connected to the first end of the end cover, a nut is installed after the other end of the sliding shaft penetrates through the first through hole, the nut is located at one end of the disc plate, the first end of the end cover is in contact with the other end of the disc plate, the slide cover, the spring is arranged on the periphery of the spring, and two ends of the spring are respectively in contact with one end of the nut, One end of the drainage sleeve is provided with a plurality of second through holes, each second through hole is coaxial with the first through hole, and the first through hole and the second through holes are not interfered with each other.

Furthermore, the outer edge of the disc plate is in contact connection with the inner wall of the valve body, and an included angle between the end face of the disc plate and the axial line of the valve body is an acute angle.

Furthermore, the interior of the valve body is communicated to the interior of the buffering component through a water pipe.

Furthermore, the water inlet end of the water pipe and the water inlet end of the pressure release valve are both positioned at the downstream of the disc plate.

Further, buffer includes the cylinder liner, a piston, the slide bar, first elastic component and second elastic component, the inside water pipe intercommunication of cylinder liner is inside to the valve body, and the income water end of water pipe is located the low reaches of dish board, the piston periphery cup joints to the cylinder liner inner wall, the one end fixed connection of piston is to the one end of slide bar, the other end fixed mounting of slide bar is to transmission assembly's periphery, and install first elastic component and second elastic component in the cylinder liner respectively, first elastic component and the mutual symmetry setting of second elastic component, first elastic component and second elastic component are located the both sides of piston respectively.

Furthermore, the first elastic assembly and the second elastic assembly are identical in structure, the first elastic assembly comprises a screw rod, a baffle and a spring, one end of the screw rod is fixedly connected to one end of the baffle, the other end of the baffle is in contact connection with one side of the piston, the other end of the screw rod penetrates through the rear periphery of the cylinder sleeve and is in threaded connection with a nut, the spring is arranged on the periphery of the screw rod, and the spring is located between the inner wall of the cylinder sleeve and the baffle.

Further, the spring in the first elastic assembly and the spring in the second elastic assembly are installed in the cylinder sleeve in a compressed state.

Further, the transmission assembly comprises a first rotating wheel, a first pin shaft and a sliding block, the first rotating wheel is installed at one end of the main shaft, the first pin shaft is installed on the first rotating wheel, the cross section of the first pin shaft is of a T-shaped structure, a long hole is formed in the middle of the sliding block, the periphery of the first pin shaft is located in the long hole, the sliding block and the first rotating wheel form the transmission assembly through the first pin shaft, and one end of the sliding rod is fixedly connected to the periphery of the sliding block.

Compared with the prior art, the swash plate butterfly check valve has the following beneficial effects:

(1) according to the inclined disc type butterfly check valve, the disc plate is additionally provided with the pressure release valve for actively eliminating secondary water hammer, when the check valve is closed and water in the pipe at the downstream of the disc plate flows back, pressure of high-pressure water is released to the end cover after passing through the pressure release hole and the second through hole, after the water pressure overcomes the pressure at the upstream of the disc plate and the elasticity of the spring, the spring is compressed, a gap is formed between the end cover and one end of the disc plate, and the high-pressure water flows into the valve body at the upstream of the disc plate and the pipeline through the pressure release hole, the second through hole and the gap, so that the pressure at the downstream of the valve body is released, and the water hammer is eliminated.

(2) The inclined disc type butterfly check valve disclosed by the utility model adopts a mode of combining the external force of the buffer component with the hydraulic force in the pipeline, so that the full opening and no shaking of the disc plate can be ensured when the disc plate needs to be opened, and the buffer component tracks the flow velocity pressure of a medium to close the check valve at a zero flow velocity when a pump is stopped and the valve is closed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of a swashplate butterfly check valve according to an embodiment of the utility model;

fig. 2 is a schematic cross-sectional view of a pressure relief valve according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a pressure relief valve according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a cushioning device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a transmission assembly according to an embodiment of the present invention.

Description of reference numerals:

1-a valve body; 2-a disc plate; 3-a main shaft; 4-a pressure relief valve; 41-end cap; 42-a slide shaft; 43-a drainage sleeve; 44-a spring; 45-locking female; 5-cylinder liner; 6-a piston; 7-a slide bar; 8-a first elastic component; 9-a second elastic component; 10-scale bar; 11-a slide block; 12-a first pin; 13-first wheel.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1-5, the swash plate butterfly check valve comprises a valve body 1, a disc 2 and a main shaft 3, wherein the periphery of the main shaft 3 is sleeved on the side wall of the valve body 1, the disc 2 is arranged on the periphery of the main shaft 3, the main shaft 3 and the disc 2 are eccentrically arranged, the disc 2 is positioned in the valve body 1, the valve body 1 and the disc 2 are concentrically arranged, a buffer assembly is fixedly arranged on the outer wall of the valve body 1, a relief valve 4 is arranged on the disc 2, one end of the buffer assembly is fixedly arranged on the periphery of one end of the main shaft 3 through a transmission assembly, the relief valve 4 comprises an end cover 41, a sliding shaft 42, a flow discharge sleeve 43, a spring 44 and a lock nut 45, a relief hole is arranged on the disc 2, the periphery of the flow discharge sleeve 43 is fixedly connected to the relief hole, a first through hole is arranged in the middle of the flow discharge sleeve 43, one end of the sliding shaft 42 is fixedly connected to the first end of the end cover 41, a nut is arranged behind the first through hole, and is positioned at one end of the disc 2, the first end of the end cover 41 is connected to the other end of the disc plate 2 in a contact mode, a spring 44 is arranged on the periphery of the sliding cover, two ends of the spring 44 are respectively connected to one end of the nut in a contact mode and one end of the drainage sleeve 43 in a contact mode, a plurality of second through holes are formed in the drainage sleeve 43, each second through hole is coaxial with the first through hole, the first through holes and the second through holes do not interfere with each other, when the check valve is closed, when water in a pipe at the downstream of the disc plate 2 flows back, pressure of high-pressure water is released to the end cover 41 after passing through the pressure relief holes and the second through holes, after the water pressure overcomes the upstream pressure of the disc plate 2 and the elastic force of the spring 44, the spring 44 is compressed, a gap is formed between the end cover 41 and one end of the disc plate 2, and the high-pressure water flows into the valve body 1 at the upstream of the disc plate 2 and the pipeline through the pressure relief holes, the second through holes and the gap, so that the downstream pressure of the valve body 1 is released, and water hammer is eliminated.

The outer fringe of dish board 2 is connected with 1 inner wall contact of valve body, and the terminal surface of dish board 2 is the acute angle with the contained angle of 1 axis of valve body, the inside water pipe intercommunication of valve body 1 leads to the inside of buffering subassembly, the income water end of water pipe, the income water end of relief valve 4 all is located the low reaches of dish board 2, the mode that the external force that adopts the buffering subassembly and the interior hydraulic power of pipeline combined together ensures that dish board 2 can open totally and do not have the shake when needs are opened, buffering subassembly traces medium flow velocity pressure and implements zero flow and close the check valve when the shut-off valve of pump.

The buffering device comprises a cylinder sleeve 5, a piston 6, a sliding rod 7, a first elastic component 8 and a second elastic component 9, the interior of the cylinder sleeve 5 is communicated with the interior of the valve body 1 through a water pipe, the water inlet end of the water pipe is positioned at the downstream of the disc plate 2, the periphery of the piston 6 is sleeved on the inner wall of the cylinder sleeve 5, one end of the piston 6 is fixedly connected to one end of the sliding rod 7, the other end of the sliding rod 7 is fixedly installed at the periphery of the transmission component, the first elastic component 8 and the second elastic component 9 are respectively installed in the cylinder sleeve 5, the first elastic component 8 and the second elastic component 9 are symmetrically arranged with each other, the first elastic component 8 and the second elastic component 9 are respectively positioned at two sides of the piston 6, the first elastic component 8 and the second elastic component 9 have the same structure, the first elastic component 8 comprises a screw rod, a baffle plate and a spring 44, one end of the screw rod is fixedly connected to one end of the baffle plate, the other end of the baffle plate is in contact connection with one side of the piston 6, the other end of the screw rod passes through the periphery of the cylinder sleeve 5 and is in threaded connection with a nut, a spring 44 is arranged on the periphery of the screw rod and is positioned between the inner wall of the cylinder sleeve 5 and the baffle, the spring 44 in the first elastic component 8 and the spring 44 in the second elastic component 9 are both installed in the cylinder sleeve 5 in a compressed state, the elastic device adopts a piston 6 cylinder with double spring effects, the elastic acting force of the piston 6 is matched with the main shaft 3 of the butterfly plate, the acting force for closing the butterfly plate 2 is implemented in a reciprocating mode in multiple stages, and finally the check valve is closed at zero flow speed.

For the initial condition and the valve aperture of conveniently observing and adjusting piston 6, set up scale 10 and chi pole in the one end of cylinder liner 5, scale 10 is located the cylinder liner 5 outside, and scale 10, chi pole and the mutual parallel arrangement of screw rod, chi pole one end fixed connection to one side of piston, the chi pole other end are located the cylinder liner 5 outside, and the staff can judge the aperture of valve through observing the relative position that is located 5 outside chi pole one end of cylinder liner and scale 10.

The transmission assembly mainly converts the rotary displacement of the main shaft 3 into transverse displacement, and is a matched eccentric structure of the displacement of the piston 6, the transmission assembly comprises a first rotating wheel 13, a first pin shaft 12 and a sliding block 11, the first rotating wheel 13 is installed at one end of the main shaft 3, the first pin shaft 12 is installed on the first rotating wheel 13, the cross section of the first pin shaft 12 is of a T-shaped structure, a long hole is formed in the middle of the sliding block 11, the periphery of the first pin shaft 12 is located in the long hole, the sliding block 11 and the first rotating wheel 13 form the transmission assembly through the first pin shaft 12, one end of the sliding rod 7 is fixedly connected to the periphery of the sliding block 11, the main shaft 3 rotates to drive the first pin shaft 12 to displace along the radial direction of the main shaft 3, the long hole is used for releasing the vertical displacement of the first pin shaft 12, the sliding block 11 transmits the transverse displacement of the first pin shaft 12 to the sliding rod 7, and the sliding rod 7 drives the piston 6 to displace in the cylinder sleeve 5.

The working process of the check valve zero-flow closing device comprises the following steps:

before the pipeline is flushed, the valve is in a closed state, the periphery of the disc plate 2 is tightly fit with the inner wall of the valve body 1, the piston 6 is in a closed valve position at the moment, the elastic force provided by the spring in the first elastic component 8 for the piston 6 is F1, the automatic torsion of the obliquely placed disc plate 2 in a self-weight closed state is F2, and F1 is equal to F2;

when the pipeline is flushed, the butterfly plate is opened under the action of water power, at the moment, F1 in the right row of the piston 6 is reduced, after F1 is gradually reduced to zero, the piston 6 compresses a spring in the second elastic assembly 9, the spring in the second elastic assembly 9 provides elastic force for the piston 6 to be F3, wherein F1 is zero when the butterfly plate 2 is opened to a certain opening degree, F3 is zero, the opening degree is set to be 5%, during the process of stable water filling, high pressure exists in the pipeline, at the moment, pressure P1 at the downstream of the valve enters a cylinder of the piston 6 through a water pipe, the piston 6 is pushed to the right by the water pressure to be increased by F3, the butterfly plate is lifted until the butterfly plate is parallel to the water flow direction, the valve is in a fully-opened state, at the moment, the piston 6 is in a fully-opened position, at the moment, the water resistance of the butterfly plate 2 is minimum, and the butterfly plate cannot shake; when the pipeline is stopped and the water supply is cut off, the pump station pressure loss P1 is 0, the cavity pressure of the piston 6 is zero, the piston 6 rapidly moves to the left under the action of F3, the valve closing action is executed, F3+ F2 is the forward thrust of the water flow, and F3 tracks the thrust of the water flow to the butterfly plate;

as the water flow speed decreases and the thrust decreases, the opening of the butterfly plate decreases and the F3 force decreases; when the opening degree of the butterfly plate reaches 5%, the water flow speed is extremely low, F3 is 0, the butterfly plate is balanced with the water flow thrust under the action of self weight, and the valve is continuously closed; the water flow continues to decelerate, the thrust force continues to be reduced to 0, the valve continues to be closed, F1 increases the self weight of the balance butterfly plate, and when the valve is completely closed, F1 is F2;

after the valve is closed, the water pressure P1 rises and acts on the butterfly plate and the piston 6 simultaneously, the pressure-bearing area of the butterfly plate is far larger than that of the piston 6, and the valve is closed; when water at the second stage appears in the pipeline, when water in the pipe at the downstream of the disc plate 2 flows back, pressure of high-pressure water is released to the end cover 41 after passing through the pressure relief hole and the second through hole, after the water pressure overcomes the upstream pressure of the disc plate 2 and the elasticity of the spring 44, the spring 44 is compressed, a gap is generated between the end cover 41 and one end of the disc plate 2, and the high-pressure water flows into the valve body 1 at the upstream of the disc plate 2 and the pipeline through the pressure relief hole, the second through hole and the gap, so that the pressure at the downstream of the valve body 1 is released, and water hammer is eliminated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. Swash plate butterfly check valve, including valve body (1), dish board (2) and main shaft (3), main shaft (3) periphery is cup jointed to valve body (1) lateral wall, and main shaft (3) periphery installation dish board (2), and main shaft (3) and dish board (2) eccentric settings, dish board (2) are located valve body (1), and valve body (1) and dish board (2) set up its characterized in that with one heart: buffer unit fixed mounting is to valve body (1) outer wall, install relief valve (4) on dish board (2), transmission unit fixed mounting is passed through to buffer unit's one end peripheral to main shaft (3), relief valve (4) are including end cover (41), slide shaft (42), the cover that leaks (43), spring (44) and lock mother (45), be equipped with the pressure release hole on dish board (2), it is downthehole that the cover that leaks (43) periphery fixed connection to the pressure release, it is equipped with first through-hole to leak set (43) middle part, slide shaft (42) one end fixed connection is to the first end of end cover (41), the other end of slide shaft (42) passes behind the first through-hole mounting nut, the nut is located the one end of dish board (2), the first end contact of end cover (41) is connected to the other end of dish board (2), the periphery of sliding closure sets up spring (44), the both ends of spring (44) contact respectively and are connected to the one end of nut, One end of the drainage sleeve (43) is provided with a plurality of second through holes, each second through hole is coaxial with the first through hole, and the first through hole and the second through holes are not interfered with each other.

2. The swash plate butterfly check valve of claim 1, wherein: the outer edge of the disc plate (2) is in contact connection with the inner wall of the valve body (1), and the included angle between the end face of the disc plate (2) and the axis of the valve body (1) is an acute angle.

3. The swash plate butterfly check valve of claim 1, wherein: the interior of the valve body (1) is communicated to the interior of the buffer component through a water pipe.

4. The swash plate butterfly check valve of claim 3, wherein: the water inlet end of the water pipe and the water inlet end of the pressure release valve (4) are both positioned at the downstream of the disc plate (2).

5. The swash plate butterfly check valve of claim 1, wherein: buffer includes cylinder liner (5), piston (6), slide bar (7), first elastic component (8) and second elastic component (9), inside water pipe intercommunication to valve body (1) inside cylinder liner (5), and the income water end of water pipe is located the low reaches of dish board (2), piston (6) periphery cup joints to cylinder liner (5) inner wall, the one end fixed connection of piston (6) to the one end of slide bar (7), the other end fixed mounting of slide bar (7) to transmission assembly's periphery, and install first elastic component (8) and second elastic component (9) in cylinder liner (5) respectively, first elastic component (8) and second elastic component (9) symmetry each other set up, first elastic component (8) and second elastic component (9) are located the both sides of piston (6) respectively.

6. The swash plate butterfly check valve of claim 5, wherein: the structure of first elastic component (8) is the same with second elastic component (9), first elastic component (8) include screw rod, baffle and spring (44), the one end fixed connection of screw rod to the one end of baffle, the other end contact of baffle is connected to one side of piston (6), the other end of screw rod passes the peripheral back threaded connection nut of cylinder liner (5), the periphery of screw rod sets up spring (44), and spring (44) are located between cylinder liner (5) inner wall and the baffle.

7. The swash plate butterfly check valve of claim 5, wherein: the transmission assembly comprises a first rotating wheel (13), a first pin shaft (12) and a sliding block (11), the first rotating wheel (13) is installed at one end of the main shaft (3), the first pin shaft (12) is installed on the first rotating wheel (13), the cross section of the first pin shaft (12) is of a T-shaped structure, a long hole is formed in the middle of the sliding block (11), the periphery of the first pin shaft (12) is located in the long hole, the sliding block (11) and the first rotating wheel (13) form the transmission assembly through the first pin shaft (12), and one end of the sliding rod (7) is fixedly connected to the periphery of the sliding block (11).

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